#body{
	width: 70%;
	height: auto;
	background: whitesmoke;
	margin: 0 auto;
}

#head{
	height: 70px;
}

.headright{
	width: 100px;
	height: 50px;
	float: right;
	margin-right: 20px;
	margin-top: 10px;
	text-align: center;
	border-radius: 1em;
	background: rgb(225,225,225);
	line-height: 50px; /*设置line-height与父级元素的height相等*/
	overflow: hidden; /*防止内容超出容器或者产生自动换行*/
}
